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From Esteban Gutierrez Moguel <esteban...@gmail.com>
Subject Re: HDFS FS Commands Hanging System
Date Mon, 03 Jan 2011 02:36:39 GMT
Hi Jon,

could you please restart your daemons? According to your firsts log files
NameNode binds to 127.0.0.1:8020 which is weird since your configuration
file and the output of netstat show the port 9000.

cheers,
esteban.



On Sun, Jan 2, 2011 at 18:02, Jon Lederman <jon2718@gmail.com> wrote:

> Hi Esteban,
>
> Thanks for your response.
>
> I don't have the fuser executable installed on the environment I am running
> on.
>
> However, I do find the following:
>
> # jps
> 923 JobTracker
> 870 SecondaryNameNode
> 1188 Jps
> 794 DataNode
> 996 TaskTracker
> 727 NameNode
> # netstat -l
> Active Internet connections (only servers)
> Proto Recv-Q Send-Q Local Address           Foreign Address         State
> tcp        0      0 (null):sunrpc           (null):*                LISTEN
> tcp        0      0 (null):ssh              (null):*                LISTEN
> tcp        2      0 localhost.localdomain:9000 :::*
>  LISTEN
> tcp        0      0 localhost.localdomain:9001 :::*
>  LISTEN
> tcp        0      0 ::%989480:50060         :::*                    LISTEN
> tcp        0      0 ::%989704:50030         :::*                    LISTEN
> tcp        0      0 ::%989480:50070         :::*                    LISTEN
> tcp        0      0 ::%989480:telnet        :::*                    LISTEN
> udp        0      0 (null):sunrpc           (null):*
> Active UNIX domain sockets (only servers)
> Proto RefCnt Flags       Type       State         I-Node Path
> unix  2      [ ACC ]     STREAM     LISTENING       1281 @MONITOR_617_1
> #
>
> So, all of the daemons are running.  Please note the following out of my
> log files:
>
> When I look at the log files, the NameNode on startup indicates:
> Network topology has 0 racks and 0 datanodes
> Also, my DataNode startup log is suspiciously short indicating only.
>  /************************************************************
> STARTUP_MSG: Starting DataNode
> STARTUP_MSG: host = localhost/127.0.0.1
> STARTUP_MSG: args = []
> STARTUP_MSG: version = 0.20.2
> STARTUP_MSG: build =
> https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.20 -r
> 911707; compiled by 'chrisdo' on F
> ri Feb 19 08:07:34 UTC 2010
> ************************************************************/
> There is no attempt from the DataNode to communicate or otherwise establish
> communication with the NameNode.  It appears to me that the NameNode and
> DataNode aren't communicating, which may be the source of my problem.
>  However, i don't know why this would be or how I can debug it since I am
> not sure of the internal operation of Hadoop.
>
> Any thoughts on all of this.  Thanks in advance.
>
> -Jon
>
>

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